Ditch-digging machine



K. J. NORDBY.

DITCH DIGGING MACHINE.

APPLlCATlON FILED JAN. 6, 1920.

1,374,093., Patented Apr. 5,1921.

UNITED STAE r QFFIE.

KRISTOFFER JENSEN NCRDBY, OF LIER, NORWAY.

DITGH-DIGGING vmcnmn.

Specification of Letters Patent.

Patented Apr. 5, 1921'.

Application filed January 6, 1920. Serial No. 349,796.

drawings, and to letters or figures of refer-' ence marked thereon, which form a part of this specification.

This invention relates to the type of ditch digging machines, the digging apparatus of which comprises an oscillating substantially vertical beam provided with teeth or diggers working on the end face of the ditch.

In the machines of this kind it has been found to be of considerable importance, that the curves described by the diggers are in such relation to the ditch wall that shocks in the longitudinal direction of the machine are avoided as far as possible. This is obtained according to the present invention by means of a guiding mechanism for the oscillating beam giving the same such a movement that the radii of curvature for the curves described by the several diggers have their maximum at the parts of the curves on which the diggers are workin The invention also comprises means for facilitating the removal of gravel fromthe digging apparatus, and the subsequent conveying of the gravel from the beam of the ditch to the ground.

On the drawing Figure l is a side view of the rear part of the machine showing the di ging apparatus.

ig. 2 is a detail of the conveyer.

The digging machine comprises as usual an oscillating vertical beam 1 driven by means of crank 2 and guided in slot 3. Said slot 3 is so formed and placed with regard to crank 2, that the diggers 4 describe the egglike curves indicated in dotted lines, the upper curves having their longitudinal axes more or less vertical, while the lower curves have their axes in a more or less horizontal position, the parts of the curves having the largest radii of curvature being always adjacent the wall of the ditch.

By means of the oscillating beam the gravel is loosened and thrown backward where it is taken up by the elevator. The

elevator comprises a plurality of flat plates 5 constituting links (Fig. 2) each having two eyes 5 formed on one end, and'two eyes 5 formed on the other end thereof, the

axes of said eyes being in substantially the 9 plane of the plates. The'eyes v5 are so spaced apart that when two plates 5 are placed end to end said eyes 5 will lie between the inner edges of the eyes 5*, and

the plates are connected together by a bolt or pin 6 passing through both pairs of eyes as shown in Fig. 2,thus forming a hinged connection. Each plate 5 is formed with two longitudinal parallel slots 7 forming a central portion 8 which is shorter than the sides of the plate, thus leaving a space or transverse slot 7 between one end of the said central portion and the eyes, 5 and 5 A bucket 9, of the form shown in Fig-p1, consists of two sides 9*, a curved end 9", and a bottom portion 10 having an integral sleeve 10 formed .on one end adapted to fit between the inner edges of the eyes 5" and through which the pin 6 passes forming a pivot for the bucket, the sides 9 and end 9 of the latter normally extending through the slots 7 and 7 respectively. i

The central part 8 ofthe plate links fit into the elevator buckets 9, and in their normal position lie flat against the bottom- 10 of the same. The bottom 10 of the elevator buckets 9 is provided with lateral lugs 11 adapted to be engaged by a curved guide 12 by meansof which the buckets are swung back, as indicated in Fig. 1. By this movement the remaining contents of the bucket are removed from the same by means of plate 9, whlch remains in its orlginal posl tion, and the exterior surface of which is I scraped clean by means of stationary scraper 13.

The carriage frame 14 is mountedon a front axle axle 17.

Claims a (not shown) and on a rear 1. An elevator for excavators and the like, comprising an endless carrier consist ing of a plurality of articulated flat plates each having a transverse slot and longitudis nal slots formed therein, and a pair of connecting eyes on opposite ends, the eyes on one end of each plate adapted to lie between the eyes on the opposite end'of an adjoining plate, abucket having a connecting sleeve on one end adapted to fit between both pairs of eyes of adjoining plates, a pin passing through said eyes and sleeve forming a hinge connection therefor, and an end and sides formed on said bucket adapted ,to normally extend through the slots in the plates.

2. An elevator for excavators and the like, comprising an endless carrier consisting of a plurality of articulated flatplates each having a transverse slot and longitudinal slots formed therein and a pair of conboth pairs of eyes of adjoining plates, a pin passing through said eyes and sleeve forming a hinge connection therefor, an end and sides formed on said bucket adapted to normally extend through the slots in the plates, means for operating the elevator, a station ary guide, and lugs on the buckets engaged by the latter for withdrawing the buckets from said slots.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of tWo subscribing Witnesses. V

KRlSTOFFER JENSEN NDRDBY.

Witnesses NATH. HnnnNsoI-ioN, E. S. HENDRICKSEN. 

